ci: Windows binary build and docker_smoke failing on main

[evan-zhang11]

Problem

Two CI jobs are failing on the main branch:

1. binaries (windows-latest, x86_64-pc-windows-msvc) — Build backend binaries step fails
2. docker_smoke — Build image (smoke) step fails

All other checks pass (linux, macos, fmt, clippy, tests, e2e).

CI run: https://github.com/sharkAndshark/mapflow/actions/runs/26435194773

Impact

• No Windows release artifacts
• Docker image not being built/tested
• Release pipeline blocked

Next steps

• Check Windows build logs for compilation error
• May be related to PostGIS/tokio-postgres features or platform-specific dependencies